Table 2 Baseline characteristics according to high or low RES in lobe with cancer
Characteristic | Cancer in a lobe with lower RES (N = 298) | Cancer in a lobe with higher RES (N = 159) | P value |
|---|---|---|---|
COPD | 75 (25.2) | 88 (55.3) | < 0.001 |
DLCO (<  80) | 87 (29.9) | 73 (49.3) | < 0.001 |
Smoking | Â | Â | < 0.001 |
 Never | 137 (46.0) | 27 (17.0) |  |
 Ever | 161 (54.0) | 132 (83.0) |  |
Pathologic stage | Â | Â | 0.347 |
 I | 188 (64.2) | 93 (59.6) |  |
 II | 56 (19.1) | 39 (25.0) |  |
 III | 49 (16.7) | 24 (15.4) |  |
Differentiation | Â | Â | < 0.001 |
 Well + Moderate | 270 (90.6) | 123 (77.4) |  |
 Poorly | 28 (9.4) | 36 (22.6) |  |
Pleura invasion | 68 (22.8) | 54 (34.0) | 0.028 |
Lymphatic invasion | 89 (30.2) | 52 (32.9) | 0.548 |
Vascular invasion | 40 (13.6) | 35 (22.2) | 0.019 |